code: def printer(x):
      """Print."""
      logger.info("exec")
      return x
  
file_path: mne-python/mne/io/tests/test_apply_function.py
imports: import numpy
  import pytest
  from mne import create_info
  from mne.io import RawArray
  from mne.utils import catch_logging, logger
label_desc: Use image node_id 4 for calling a global function with example usage: printer(x) and returns: x